Type-writing machine.



No. 885,509. PATENTED APR. 21, 1908 a. A. MoLEAN.

TY PB WRITING MAGHINB. A PPLIOATION IILE D I'll 3.25, I908.

Witnesses v 171M922 to rshortens. MCLEAN, OF ATLANTA, GEORGIA, ASSIGNOR 'ro UNnERwoon TYPEWRITAER OOMEANY, on NEW YORK, -N. Y., AcoRPoRATIoN on NEW JERSEY.

Beit known thatI, GEORGE citizen of the United States, residin in At TYPE-WRITING MACHINE;

Specification of Letters Patent. PatentedApril 21, 1.90 8.

2 "A licant' filed February 25,1908. sesame. 417,783. v

To all whom it mai concem: I

A. MGLEAN, a

lanta, inthecounty ofFulton and tate of Geor 'a, have invented certain new and useful mprovements in T e ''Writing Ma-' chines, ofwhich the following is a specifics-j tion.*, r.

This invention relates to the keyboards of typewriting and analogous machines. Ma-

. chines'of this character are commonlyused' by the the mec in-telegra hand otherofiices where "it often happens t at during the absence of the maclnne-operator..;a boy or unskilled person Ttakes'advantage of such absence: and at" term ts to 'operate the machine, sometimes spoi 'ng the work that was left in the machine operator, and sometimes disarranging anism and 'injuri-ng'the machinel The object-f my invention is to overcome. this 'diflicult and to provide: a-device which will enable t e machine operator to leave the fmachinejnnattended at anytime without risk of its being tam cred withby unauthorized persons. To t 'send, 1 provideinexpensive and effective means for looking all of the key leversin normal positions by means "of a lock operable by a removable key, so

that'the machine operator may, by simply: introducing the key in the lock and turnln the same, putthe machine out of use; an

hemay remove the key and'absent himself Withoutpossibilit'y of the machine being op erated during his absence.

I illustrate .in'y improvements applied :to the well known Underwood typewriting' machine, u "on which I have secured an ordinary ale .orother lock having a removablelkey, and the bolt of the lock is caused to .olplerate the bar usually providedin said mac 'ne for locking the key levers against movement at'the completion of a line of 7 writing.v Thus by a simple addition, con- 'sisting of an inexpensive lock, the machine is rendered insusceptible to injury from the cause stated.

In the accompanying drawings, Figure 1 is h sectional side elevation of part ofan Underwood typewriting machine, including my improvements, showmg the key-levers locked against operation. Fig. 2 is a fragmentary r pective View of a typewriting machine ame, showing the lock secured thereto, and a removable key inserted insaid lock. Fig.

-3 is a perspective viewv of the locking means abuttin 2, have usually provided a key-locking mechanism, -,-c( mprisin a pair of arms 5 fulcrumed upon a rod 6, an supporting a locking-bar 7 which extends transversely of the key levers, to engagehooks 8 thereon to lock them a ainst secure an ordinary Yale or other lock Fig. 4 is a view simi artoFig. 1, but

operation at the completion of a line oi writ HIQ;

9 upon a bracket 10 attached to the frame-0f the machine, the lock having a bolt 11 oper An' arm 13,. ,preferably pivoted. upon the bracket 10, has

able by a removable key 12.

a pin or projection 14 in the path of the bolt- 11, so that the ,bolt,.when thrown out by the key, swin s the ar'm13 forwardly, andan car 15 on sai arm engages the arm 5 to swing the locking-bar 7 under the hooks 8 of the levers, to lock them a ainst de ression.

f% he locking bar 7 is hel normal y out of engagement with the key levers by means of I a s ring 16, coiled around the rod '7.

he rearward movement of the locking bar is usually limited by a in 17 secured in a collar 18 fastened upon tll e rod 6, said pin against a lug or the mac iine'frame, Fig. 4.

' When a is desired to lock the machineiri normal position, the key 12 is inserted into the lock and manipulated. so that the bolt '11 of the lock will engage the in or projection 14 of the arm 13, throwing the same forward, the ear 15 engaging with the arm 6 and swinging said arm and the locking-bar 7 forward to Fi 1 position.-

To unlock projection 19 on e machine, the-key 12 is nianipulated tothrow back'the bolt 1 1,when the spring 20 will pullback the arm. 13,, and the spring 16 will swing the lockingbar 7 back and release'the key levers. Having thus described my invention, claim: i

1. In atypewritingmachine, the conibinaa le by a removable key, an an arm folcrumed on said lock and movable by the bolt iio \ able key, and an arm fulcrumed on the casing ment.

' of the lock having a in or projection en a'ge-.

ableby the bolt of t e lockto move sai arm in engagementwith the line-locking mechanismto lock the key levers against move 3. In a t pewriting machine; the combine v I tion with ey-levers, of anarm fulcrinmad.

in the machine-frame, and supporting allocking-bar normally out of en agement yiith the key-levers, a lock secure frame and having a bolt operable by a're- 5 ml the f machine movable key, and an arm ri oteol upon the casing of the lock and mova 1e by the bolt'to engage the first-mentionedarm to swing it and the bar positions. I

4. Inaty ewri-tin machine, thepombination with the key evers and line-locking mechanism, of a lock operable by a removable key and having a bolt,'a bracket to seto lock the key-levers in normal arm pivoted on said bracket and having a 1 pin or projection en ageable by the bolt, said armienga cable wit 1 the line-locking mechanism to ock'the levers in normal ositions. c "GEO, A. M0 EAN.

Witnesses: EDWARD, ENGLAND,

E. W. hlONTEITEL.

. curesaidlock to the machine frame, and an 

